Not to change the subject.............................however,

Wingwiz seems to have the technical answer, I guess, I donno.

I have been doing my best to spread the word about them wingtips. On any of the profile or 3D planes, the wingtips seem to slow down the roll rate and make the plane tuck when it rolls. The wingtips do make the plane, more stable. However with these types of plane, the more unstable, the wilder they are, and isn't that the reason we fly them.

Tipless: Faster roll rate

Tips: More stable